Lawrence beady



(No Model.) A

L. BRADY.

Power Hammer. l No. 241,285. Patented May 10,1881.

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LAWRENCE BRADY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MICHAELHAYDEN, OF SAME PLAGE.

rPOWER-H'IVIIVI ER?.

SPECIFICATION forming part of Letters Patent No. 241,285, dated May 10,1881,

Application tiled December 111, 1880.

To all whom t may concern.-

Be it known that I, LAWRENCE BRADY, a citizen ofthe United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented new and useful Improvements in Power-Hammers, of which the following is a specification, reference being had tothe accompanying drawings, where- 1n- Figure l is a side elevation of apower-hammer embodying my improvements, and Fig. 2Y

is a side elevation ofthe improvements.

My invention has reference to the improved machine for heading bolts,for which Letters Patent ot' the United States, dated July S, 1879, No.217,827 were granted to me and Michael Hayden.

My present improvements have for their principal object to provide meansfor holding up the hammer while the headed bolt is being removed fromaud the blank is being inserted in the die.

My improvements have for their further oblject to provide means foreasing or cushioning the operating-crank on its upstroke.

My improvements consist, rst, in the provision ot' a support for holdingup the hammer while the headed bolt is being removed from and the blankis beinginserted in the die, said device being controlled by the treadlewhich moves the clutch on the crank-shaft to start and stop the latter;second, in the provision of a top yieldingplate in the crank-lever, saidplate being loca-ted opposite to the lower yielding plate, (shown in thepatent above mentioned,) and being designed, as already stated, to easethe crank on its upstroke.

Referring to the accompanying drawings, A represents the crank, (shownin the patent above named,) and B the lever which it vihrates.

Gis thelower yielding plate. (Shown in said patent.) C is anotheryielding plate of like construction, located on said lever B, oppositethe plate C, and operating to ease or cushion the crank on its upstroke.

Dis the treadle, by means of which the clutch d is thrown on and ol'` tostart the crank-shaft so as to operate the lever B.

E shows another lever, whose lower end, c,

(No model.)

is fitted between studs d d on the treadle D, so as to be vibrated onits fulcrum c whenever said treadlc is moved.

F shows a slide sustained on an arm, G, pivoted between uprights g g,which are sustained on projections II Il, mounted on the frame of themachine. The arm G is connected by a chain, K, to a spring-bar, lf, soas to permit it to yield elastically whenever the hammer drops on theslide F. Said chain is provided with a turn-buckle, k, whereby theamount of motion of the arm G may be regulated or adjusted. Said slidehas a projectingstud, f, which works in an elongated slot, c2, in thelever E, so that whenever the treadle is depressed by the operators footthe slide will be drawn backward,

while, whenever the treadle is relieved of pressas to permit theoperator free access to the latter for the purpose of removing theheaded bolt from and inserting the blank therein. As soon as the blankis duly inserted in the die the operator depresses the treadle with hisfoot, thereby drawing back the slide out of the path of the hammer-handle. At the same time and by the same motion he brings thecrankshaft into clutch engagement, causing said crank to vibrate thelever B and the hammer to strike. As soon as the bolt has been headedthe operator relaxes his foot-pressure on the treadle, whereupon theclutch, heilig thrown out by the spring d2, ceases to engage with thecrank-shaft, and the slide F moves forward into the path of thehammer-handle and receives the latter, supporting it in an elevatedposition until the headed bolt has been withdrawn from the die, a freshblank inserted, and the crank-shaft again set in motion.

What I claim as my invention is as follows:

l. In a bolt-headin g machine or oliver,77 the combination, with the hammer, the crank-shaft, and clutch mechanism, of a movable support i'orsustaining said hammer in an elevated p0- sition, said support beingconnected with the operatingtreadle, which is also connected with IOOtheclutchmechanismvhereby,Whenthe meehing the said crank on itsupstroke7 substananism for operating the hammer is brought tially asshown and described.

into operation, said support is moved out of In testimony that I claimthe foregoing I the path of the hammer, substantially as set havehereunto set my hand this 9th dziyof 0cA 5 forth. tober, 1880.

2. The combination with the treadle D and T i hammer N n, of the leverE, arm G, and sliding LAVRELbE BRADY' hammer-support F, substantially asset forth. Witnesses:

3. In combination with the crank A and le- WM. M. MCKNIGHT, Io ver B,the top yielding plate, C', for oushion- S. J. VAN STAVOREN.

